The angle bisectors of the three angles of XYZ, intersect at the incenter of the circle. With that incenter a circle can be drawn to touch the three sides internally. 6.
To comply with Navigation Rules and for distress signaling purposes all boats must carry a sound producing device (whistle, horn, siren, etc.) capable of a 4-second blast audible for Â½ mile. *Boats larger than 39.4 ft. are no longer required to have a bell (see Navigation Rules.)
A speaker produces sound because the electricity moving through the voice coil generates a magnetic field (it becomes an electromagnet), which pushes or pulls against the magnetic field generated across the pole pieces by the permanent magnet structure (the neodymium magnet in our speakers), and as the voice coil is connected directly to the woofer cone the movement of the voice coil thus moves the woofer cone.